The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.
# Object: 17BK229 # Created Mon Apr 28 01:11:02 2025 # Orbit generated from Bernstein formalism # Fitting 98 observations of 99 # Arc: 2.01y # First observation: 2016/01/15 # Last observation: 2018/01/17 Preliminary a, adot, b, bdot, g, gdot: -0.000006 0.017957 -0.000002 -0.000464 0.020804 0.000000 # Chi-squared of fit: 84.01 DOF: 190 RMS: 0.16 # Min/Max residuals: -0.53 0.44 # Exact a, adot, b, bdot, g, gdot: 1.295425E-05 1.793631E-02 -1.323182E-07 -4.634182E-04 2.080135E-02 1.009630E-04 # Covariance matrix: 4.8542E-13 -7.4153E-13 -8.5275E-15 1.4465E-14 -3.7526E-13 -1.3931E-11 -7.4153E-13 1.4785E-12 2.2023E-14 -3.4034E-14 9.9496E-13 3.3047E-11 -8.5275E-15 2.2023E-14 2.4261E-13 -2.0394E-13 1.8066E-14 5.5467E-13 1.4465E-14 -3.4034E-14 -2.0394E-13 1.8285E-13 -2.5472E-14 -8.7111E-13 -3.7526E-13 9.9496E-13 1.8066E-14 -2.5472E-14 8.3520E-13 2.4951E-11 -1.3931E-11 3.3047E-11 5.5467E-13 -8.7111E-13 2.4951E-11 8.4463E-10 # lat0 lon0 xBary yBary zBary JD0 -9.983206 151.238790 0.589382 -0.136311 -0.775415 2457403.107207 # Heliocentric elements and errors Epoch: 2457400.5000 = 2016/01/13 Mean Anomaly: 186.23978 +/- 1.137 Argument of Peri: 75.40444 +/- 1.138 Long of Asc Node: 249.87832 +/- 0.008 Inclination: 9.95117 +/- 0.000 Eccentricity: 0.07459468 +/- 0.0002 Semi-Major Axis: 45.48028422 +/- 0.0031 Time of Perihelion: 2511473.5724 +/- 353.7 Perihelion: 42.08769700 +/- 0.0090 Aphelion: 48.87287143 +/- 0.0092 Period (y) 306.7206 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -41.91559437 +/- 0.0018 Ecliptic Y 23.67440732 +/- 0.0010 Ecliptic Z -8.33407370 +/- 0.0004 Ecliptic XDOT -0.00113881 +/- 0.0000 Ecliptic YDOT -0.00207524 +/- 0.0000 Ecliptic ZDOT -0.00006235 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 48.85541319 +/- 0.0016 Geocenter to KBO 48.07379996 +/- 0.0021 # Hcoef: 7.84
The following table shows the complete astrometric record for 17BK229. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (17BK229) followed by the observatory code and reference code for the source of the astrometry.
2016 01 15.606418 09 58 57.22 +01 41 13.8 23.6z 17BK229 T09 C~7uj7 2016 01 15.641081 09 58 57.09 +01 41 14.4 17BK229 T09 C~7uj7 2016 01 15.668933 09 58 57.01 +01 41 14.7 17BK229 T09 C~7uj7 2016 12 25.51821 10 03 41.68 +01 16 31.9 25.3r 17BK229 T09 C~7uj7 2016 12 25.54616 10 03 41.64 +01 16 31.9 25.1r 17BK229 T09 C~7uj7 2016 12 25.59402 10 03 41.50 +01 16 32.1 25.1i 17BK229 T09 C~7uj7 2017 01 21.41782 10 02 24.42 +01 19 21.1 24.4z 17BK229 T09 C~7uj7 2017 01 21.44099 10 02 24.35 +01 19 21.3 24.0z 17BK229 T09 C~7uj7 2017 01 21.45826 10 02 24.28 +01 19 21.6 24.6z 17BK229 T09 C~7uj7 2017 01 21.48580 10 02 24.20 +01 19 21.8 24.1z 17BK229 T09 C~7uj7 2017 01 21.51187 10 02 24.10 +01 19 21.9 24.5z 17BK229 T09 C~7uj7 2017 01 21.53790 10 02 24.01 +01 19 22.4 24.0z 17BK229 T09 C~7uj7 2017 01 21.57598 10 02 23.88 +01 19 22.9 25.3z 17BK229 T09 C~7uj7 2017 01 23.36273 10 02 17.49 +01 19 45.9 24.8r 17BK229 T09 C~7uj7 2017 01 23.39642 10 02 17.35 +01 19 46.3 24.8r 17BK229 T09 C~7uj7 2017 01 23.41024 10 02 17.31 +01 19 46.8 24.5r 17BK229 T09 C~7uj7 2017 01 23.52068 10 02 16.90 +01 19 47.9 24.2i 17BK229 T09 C~7uj7 2017 01 23.56169 10 02 16.76 +01 19 48.6 24.0i 17BK229 T09 C~7uj7 2017 01 23.59193 10 02 16.65 +01 19 48.9 24.3i 17BK229 T09 C~7uj7 2017 01 30.43912 10 01 51.08 +01 21 30.3 24.4i 17BK229 T09 C~7uj7 2017 01 30.46126 10 01 50.99 +01 21 30.5 24.3i 17BK229 T09 C~7uj7 2017 01 30.50547 10 01 50.82 +01 21 31.1 23.9z 17BK229 T09 C~7uj7 2017 01 30.56834 10 01 50.57 +01 21 32.3 24.3z 17BK229 T09 C~7uj7 2017 01 30.59415 10 01 50.48 +01 21 32.7 24.1z 17BK229 T09 C~7uj7 2017 02 01.34504 10 01 43.74 +01 22 00.9 25.0g 17BK229 T09 C~7uj7 2017 02 01.35930 10 01 43.67 +01 22 02.1 25.3g 17BK229 T09 C~7uj7 2017 02 01.41992 10 01 43.40 +01 22 02.9 25.7g 17BK229 T09 C~7uj7 2017 02 01.44869 10 01 43.31 +01 22 03.6 25.7g 17BK229 T09 C~7uj7 2017 02 21.32404 10 00 23.51 +01 28 38.9 24.6z 17BK229 T09 C~7uj7 2017 02 21.33504 10 00 23.48 +01 28 39.3 23.9z 17BK229 T09 C~7uj7 2017 02 21.33887 10 00 23.46 +01 28 39.3 24.5z 17BK229 T09 C~7uj7 2017 02 21.34959 10 00 23.41 +01 28 39.5 24.5z 17BK229 T09 C~7uj7 2017 02 21.36441 10 00 23.37 +01 28 39.8 24.6z 17BK229 T09 C~7uj7 2017 02 21.37870 10 00 23.30 +01 28 40.1 23.8z 17BK229 T09 C~7uj7 2017 02 21.38235 10 00 23.29 +01 28 40.1 24.1z 17BK229 T09 C~7uj7 2017 02 21.38619 10 00 23.27 +01 28 40.1 24.4z 17BK229 T09 C~7uj7 2017 02 21.40442 10 00 23.19 +01 28 40.8 24.2z 17BK229 T09 C~7uj7 2017 02 21.41191 10 00 23.15 +01 28 41.1 24.4z 17BK229 T09 C~7uj7 2017 02 21.42282 10 00 23.09 +01 28 41.3 24.2z 17BK229 T09 C~7uj7 2017 02 23.31993 10 00 15.47 +01 29 24.3 26.0g 17BK229 T09 C~7uj7 2017 02 23.32237 10 00 15.44 +01 29 24.3 26.0g 17BK229 T09 C~7uj7 2017 02 23.33356 10 00 15.40 +01 29 24.5 25.5g 17BK229 T09 C~7uj7 2017 02 23.46720 10 00 14.83 +01 29 27.7 25.8r 17BK229 T09 C~7uj7 2017 02 23.49694 10 00 14.73 +01 29 28.5 26.1r 17BK229 T09 C~7uj7 2017 02 23.50008 10 00 14.72 +01 29 28.5 25.8r 17BK229 T09 C~7uj7 2017 02 23.50391 10 00 14.70 +01 29 28.5 25.8r 17BK229 T09 C~7uj7 2017 02 23.51193 10 00 14.66 +01 29 28.7 25.7r 17BK229 T09 C~7uj7 2017 02 23.51437 10 00 14.66 +01 29 28.9 25.4r 17BK229 T09 C~7uj7 2017 02 25.36128 10 00 07.21 +01 30 11.4 24.6i 17BK229 T09 C~7uj7 2017 02 25.41253 10 00 07.02 +01 30 12.6 24.4i 17BK229 T09 C~7uj7 2017 02 25.43124 10 00 06.95 +01 30 12.9 24.3i 17BK229 T09 C~7uj7 2017 02 25.43480 10 00 06.95 +01 30 13.2 24.1i 17BK229 T09 C~7uj7 2017 03 04.26703 09 59 39.95 +01 32 55.5 23.5z 17BK229 T09 C~7uj7 2017 03 04.27420 09 59 39.89 +01 32 55.4 23.9z 17BK229 T09 C~7uj7 2017 03 04.27802 09 59 39.90 +01 32 55.5 24.0z 17BK229 T09 C~7uj7 2017 03 04.28185 09 59 39.89 +01 32 56.0 24.0z 17BK229 T09 C~7uj7 2017 03 04.29255 09 59 39.81 +01 32 56.2 23.9z 17BK229 T09 C~7uj7 2017 03 04.29967 09 59 39.80 +01 32 56.4 23.6z 17BK229 T09 C~7uj7 2017 03 04.30350 09 59 39.78 +01 32 56.2 23.8z 17BK229 T09 C~7uj7 2017 03 04.30733 09 59 39.78 +01 32 56.4 23.6z 17BK229 T09 C~7uj7 2017 03 04.31803 09 59 39.73 +01 32 56.9 24.1z 17BK229 T09 C~7uj7 2017 03 04.32520 09 59 39.70 +01 32 56.7 24.1z 17BK229 T09 C~7uj7 2017 03 04.32902 09 59 39.68 +01 32 57.0 24.0z 17BK229 T09 C~7uj7 2017 03 04.33285 09 59 39.68 +01 32 56.9 24.0z 17BK229 T09 C~7uj7 2017 03 04.34360 09 59 39.61 +01 32 57.2 23.8z 17BK229 T09 C~7uj7 2017 03 04.35080 09 59 39.61 +01 32 57.7 24.3z 17BK229 T09 C~7uj7 2017 03 04.35463 09 59 39.59 +01 32 57.7 24.1z 17BK229 T09 C~7uj7 2017 03 04.46328 09 59 39.16 +01 33 00.2 24.7i 17BK229 T09 C~7uj7 2017 03 04.46710 09 59 39.15 +01 33 00.2 24.3i 17BK229 T09 C~7uj7 2017 03 04.47782 09 59 39.08 +01 33 00.7 24.2i 17BK229 T09 C~7uj7 2017 03 04.48885 09 59 39.04 +01 33 00.7 24.2i 17BK229 T09 C~7uj7 2017 03 06.49634 09 59 31.30 +01 33 49.6 25.4r 17BK229 T09 C~7uj7 2017 03 06.50449 09 59 31.28 +01 33 49.8 25.4r 17BK229 T09 C~7uj7 2017 03 06.53219 09 59 31.17 +01 33 50.5 24.9r 17BK229 T09 C~7uj7 2017 03 07.41426 09 59 27.81 +01 34 12.1 23.7y 17BK229 T09 C~83Ep 2017 03 07.42363 09 59 27.77 +01 34 12.4 23.8y 17BK229 T09 C~83Ep 2017 03 07.50339 09 59 27.51 +01 34 14.4 24.0y 17BK229 T09 C~83Ep 2017 03 21.34535 09 58 38.02 +01 39 56.9 24.8y 17BK229 T09 C~7xTl 2017 03 21.38387 09 58 37.88 +01 39 57.9 24.3y 17BK229 T09 C~7xTl 2017 03 21.39557 09 58 37.84 +01 39 58.3 25.1y 17BK229 T09 C~7xTl 2017 03 21.41085 09 58 37.79 +01 39 58.3 24.8y 17BK229 T09 C~7xTl 2017 03 25.24634 09 58 25.48 +01 41 33.0 25.5r 17BK229 T09 C~7uj7 2017 03 25.26003 09 58 25.45 +01 41 33.1 24.7r 17BK229 T09 C~7uj7 2017 03 25.26562 09 58 25.42 +01 41 33.1 24.5r 17BK229 T09 C~7uj7 2017 03 25.27375 09 58 25.40 +01 41 33.3 25.1r 17BK229 T09 C~7uj7 2017 03 25.27935 09 58 25.36 +01 41 33.6 25.2r 17BK229 T09 C~7uj7 2017 03 25.28747 09 58 25.36 +01 41 34.0 24.7r 17BK229 T09 C~7uj7 2017 03 29.26967 09 58 13.34 +01 43 10.5 25.8g 17BK229 T09 C~8Q43 2017 03 29.30574 09 58 13.24 +01 43 11.2 25.9g 17BK229 T09 C~8Q43 2017 03 29.31142 09 58 13.21 +01 43 11.3 26.0g 17BK229 T09 C~8Q43 2017 03 30.29005 09 58 10.42 +01 43 35.0 24.6i 17BK229 T09 C~8Q43 2017 03 30.33530 09 58 10.26 +01 43 36.5 24.0y 17BK229 T09 C~8Q43 2017 03 30.35826 09 58 10.22 +01 43 36.7 23.7y 17BK229 T09 C~8Q43 2017 03 30.37378 09 58 10.15 +01 43 37.3 24.8y 17BK229 T09 C~8Q43 2018 01 17.46122 10 06 28.33 +00 55 25.3 24.1i 17BK229 T09 C~7uj7 2018 01 17.51028 10 06 28.16 +00 55 25.6 24.3i 17BK229 T09 C~7uj7 2018 01 17.51830 10 06 28.10 +00 55 25.6 24.5i 17BK229 T09 C~7uj7 2018 01 17.54536 10 06 28.04 +00 55 26.0 24.3i 17BK229 T09 C~7uj7 2018 01 17.57223 10 06 27.94 +00 55 26.5 24.7i 17BK229 T09 C~7uj7
The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.
1 0.0000 0.00 0.14 0.00 -0.05
2 0.0001 -2.04 -0.13 -0.12 0.13
3 0.0002 -3.26 0.05 -0.25 0.22
4 0.9443 4515.16 0.17 100.51 -0.15
5 0.9444 4514.59 0.44 100.30 -0.04
6 0.9445 4512.56 -0.16 99.75 -0.04
7 1.0180 3370.01 -0.30 -145.68 0.02
8 1.0180 3368.95 -0.08 -145.86 0.01
9 1.0181 3367.87 -0.22 -145.95 0.04
10 1.0182 3366.67 0.10 -146.18 0.01
11 1.0182 3365.23 0.10 -146.61 -0.23
12 1.0183 3363.79 0.10 -146.61 -0.05
13 1.0184 3361.79 0.20 -146.82 0.02
14 1.0233 3263.94 0.13 -158.74 -0.10
15 1.0234 3261.83 -0.08 -159.10 -0.23
16 1.0234 3261.10 -0.04 -158.84 0.12
17 1.0237 3254.95 0.04 -159.95 -0.24
18 1.0238 3252.74 0.15 -160.03 -0.04
19 1.0239 3251.09 0.21 -160.33 -0.13
20 1.0427 2856.28 -0.01 -199.21 0.11
21 1.0427 2854.95 -0.01 -199.49 -0.06
22 1.0428 2852.35 0.07 -199.82 -0.15
23 1.0430 2848.42 -0.06 -200.00 0.00
24 1.0431 2847.01 0.10 -200.10 0.04
25 1.0479 2742.44 0.39 -208.96 -0.53
26 1.0479 2741.04 -0.14 -208.21 0.29
27 1.0481 2736.96 -0.49 -208.87 -0.07
28 1.0482 2735.45 -0.24 -208.69 0.25
29 1.1026 1475.97 -0.17 -255.98 -0.11
30 1.1026 1475.41 -0.01 -255.76 0.11
31 1.1026 1475.13 -0.04 -255.87 0.01
32 1.1027 1474.36 -0.11 -255.94 -0.06
33 1.1027 1473.69 0.20 -255.87 0.02
34 1.1027 1472.60 0.05 -255.95 -0.06
35 1.1027 1472.46 0.15 -256.01 -0.11
36 1.1028 1472.18 0.12 -256.11 -0.22
37 1.1028 1470.81 -0.05 -255.87 0.03
38 1.1028 1470.14 -0.23 -255.80 0.11
39 1.1029 1469.23 -0.42 -255.93 -0.02
40 1.1080 1347.14 0.18 -255.51 0.15
41 1.1081 1346.72 -0.08 -255.67 -0.01
42 1.1081 1346.09 0.02 -255.69 -0.03
43 1.1084 1336.96 -0.33 -255.67 -0.01
44 1.1085 1335.28 -0.06 -255.45 0.21
45 1.1085 1335.14 0.00 -255.50 0.16
46 1.1085 1334.85 -0.03 -255.60 0.06
47 1.1086 1334.22 -0.13 -255.63 0.03
48 1.1086 1334.15 -0.04 -255.44 0.22
49 1.1136 1214.63 -0.44 -254.60 -0.07
50 1.1138 1211.54 -0.17 -254.47 0.03
51 1.1138 1210.45 -0.03 -254.55 -0.06
52 1.1138 1210.35 0.10 -254.27 0.22
53 1.1325 774.29 0.27 -243.45 0.17
54 1.1326 773.48 -0.08 -243.86 -0.25
55 1.1326 773.59 0.27 -243.71 -0.12
56 1.1326 773.28 0.20 -243.30 0.29
57 1.1326 772.08 -0.31 -243.53 0.04
58 1.1326 771.87 -0.07 -243.39 0.16
59 1.1326 771.66 -0.03 -243.69 -0.14
60 1.1327 771.59 0.14 -243.50 0.04
61 1.1327 770.71 -0.05 -243.29 0.22
62 1.1327 770.36 0.06 -243.64 -0.14
63 1.1327 769.98 -0.08 -243.46 0.03
64 1.1327 770.01 0.20 -243.55 -0.07
65 1.1328 768.92 -0.21 -243.64 -0.17
66 1.1328 768.75 0.08 -243.17 0.28
67 1.1328 768.47 0.05 -243.27 0.17
68 1.1331 761.55 0.09 -243.18 0.04
69 1.1331 761.41 0.19 -243.23 -0.02
70 1.1331 760.25 -0.28 -243.13 0.06
71 1.1331 759.69 -0.14 -243.34 -0.17
72 1.1386 633.86 -0.11 -238.01 -0.09
73 1.1387 633.51 0.06 -237.93 -0.03
74 1.1387 631.72 0.01 -237.85 -0.02
75 1.1412 576.97 0.02 -235.18 0.01
76 1.1412 576.30 -0.05 -235.11 0.06
77 1.1414 571.95 ( 0.61) -234.60 ( 0.36)
78 1.1793 -242.97 0.15 -172.49 0.10
79 1.1794 -245.28 -0.01 -172.29 0.09
80 1.1794 -245.99 -0.06 -172.12 0.19
81 1.1795 -246.69 0.10 -172.38 -0.15
82 1.1900 -452.70 -0.07 -148.01 0.12
83 1.1900 -453.16 0.20 -148.07 -0.03
84 1.1900 -453.58 0.08 -148.23 -0.23
85 1.1901 -453.93 0.16 -148.15 -0.19
86 1.1901 -454.60 -0.21 -148.07 -0.16
87 1.1901 -454.73 0.08 -147.70 0.17
88 1.2010 -657.30 -0.01 -120.12 -0.12
89 1.2011 -658.95 0.16 -119.98 -0.24
90 1.2011 -659.40 -0.01 -120.05 -0.34
91 1.2038 -706.87 0.32 -112.42 -0.01
92 1.2039 -709.64 -0.21 -111.85 0.24
93 1.2040 -710.28 0.29 -111.88 0.05
94 1.2040 -711.47 -0.13 -111.68 0.13
95 2.0064 7301.82 0.13 -212.97 0.24
96 2.0066 7299.32 0.15 -213.58 0.02
97 2.0066 7298.48 -0.28 -213.90 -0.23
98 2.0067 7297.50 0.13 -213.84 0.05
99 2.0068 7295.91 -0.07 -213.89 0.21
The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.
17BK229 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.219 45.228 45.211 ecceobj 0.081 0.081 0.082 incobj 9.938 9.938 9.938 qmin 40.951 40.977 40.920 qmax 49.811 49.894 49.848 amean 45.273 45.281 45.264 amin 44.901 44.934 44.905 amax 45.653 45.675 45.646 emean 0.080 0.080 0.080 emin 0.069 0.068 0.069 emax 0.092 0.093 0.093 imean 11.512 11.511 11.513 imin 11.143 11.143 11.142 imax 11.888 11.884 11.891 excite_mean 0.215 0.215 0.215 fracstop 1.000 1.000 1.000 cjmean 3.060 3.060 3.060 libcent 0 -180.0 -180.0 -180.0 libamp 0 -180.0 -180.0 -180.0 libcent 1 -180.0 -180.0 -180.0 libamp 1 -180.0 -180.0 -180.0 libcent 2 -180.0 -180.0 -180.0 libamp 2 -180.0 -180.0 -180.0 libcent 3 -180.0 -180.0 -180.0 libamp 3 -180.0 -180.0 -180.0 libcent 4 -180.0 -180.0 -180.0 libamp 4 -180.0 -180.0 -180.0 kozaimean 177.4 177.7 177.9 kozaiamp 180.0 180.0 180.0